Home / 12,672.45-18,979.65-7,731.18

Finding the Fourth Proportional to 12,672.45, 18,979.65 and 7,731.18

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Solution

The fourth proportional to 12,672.45, 18,979.65 and 7,731.18 is: 11,579.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.45 : 18,979.65 = 7,731.18 : x
  2. Step 2: Convert to fraction form
    12,672.45/18,979.65 = 7,731.18/x
  3. Step 3: Cross multiply
    12,672.45x = 18,979.65 × 7,731.18
  4. Step 4: Simplify right side
    12,672.45x = 146,735,090.49
  5. Step 5: Solve for x
    x = 146,735,090.49/12,672.45
  6. Step 6: Final answer
    x = 11,579.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.